How to Write or Append into a File in Golang

 

    Hello friends! In this post, I will be discussing about how we can write or append into a file.

The whole code will look like below:

package main

import (

"log"

"os"

)

func main() {

// file, err := os.Create("test.txt")

file, err := os.OpenFile("main.txt", os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)

if err != nil {

log.Fatal("Oops! Some error: ", err.Error())

}

defer file.Close()

_, er := file.WriteString(" and Java")

if er != nil {

log.Fatal("Oops! Some error: ", er.Error())

}

}